Hello everyone, heres my situation. I just bought all my new PC parts off of newegg and my vista 64bit OEM is on its way. I wanted to know once i get my vista installed, will i need to do a fresh install or can i choose the other method (sorry brainfart and i can't remember the term used). Also, if i ever decide (which probably wont happen) to go back to Vista, will my OEM version be able to be used again. I'll have the same mobo, so no worries there.